Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of capital lease activity

The tables below summarize our capital lease activity:

	Years Ended December 31,
	2018		2017	2016
	(Dollars in millions)
Assets acquired through capital leases	$	25	35	45
Depreciation expense	51		50	70
Cash payments towards capital leases	48		48	58

	As of December 31,
	2018		2017
	(Dollars in millions)
Assets included in property, plant and equipment	$	427	420
Accumulated depreciation	180		154

Schedule of future annual minimum payments under capital lease arrangements

The future annual minimum payments under capital lease arrangements as of December 31, 2018 were as follows:

	Future Minimum Payments
	(Dollars in millions)
Capital lease obligations:
2019	$	51
2020	36
2021	23
2022	21
2023	20
2024 and thereafter	183
Total minimum payments	334
Less: amount representing interest and executory costs	(100		)
Present value of minimum payments	234
Less: current portion	(38		)
Long-term portion	$	196

Schedule of future rental commitments for operating leases

At December 31, 2018, our future rental commitments for Right-of-Way agreements and operating leases were as follows:

	Right-of-Way Agreements	Operating Leases	Total
	(Dollars in millions)
2019	157	675	832
2020	134	443	577
2021	112	355	467
2022	120	279	399
2023	115	241	356
2024 and thereafter	755	969	1,724
Total future minimum payments(1)	1,393	2,962	4,355

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(1)Minimum payments have not been reduced by minimum sublease rentals of $101 million due in the future under non-cancelable

subleases.